It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://mit-edu-4387560192-gov.caltech-edu.pp.ua/post/089190977262

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "mit-edu-4387560192-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910125090b199c70',cH: 'pjq1JeZ_09nbzYVg2jIkEsNS.8q5QaTO8pxdRJiDnpo-1739243413-1.2.1.1-_AUD9MMGOvrFnB.iRyts8nhqp3zrLP8jMNSJl.xgqW_9ECJ8BIHY6KkwaL1llnhu',cUPMDTk: "\/post\/089190977262?__cf_chl_tk=xBFdBFWaHsslVSXikqbQE2mLlst2VdP41LWhoZrqWuM-1739243413-1.0.1.1-bj1l_zEsljLqSHwJJR8D_N.KnkMKxx76W6gf_3aJeIk",cFPWv: 'g',cITimeS: '1739243413',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/089190977262?__cf_chl_f_tk=xBFdBFWaHsslVSXikqbQE2mLlst2VdP41LWhoZrqWuM-1739243413-1.0.1.1-bj1l_zEsljLqSHwJJR8D_N.KnkMKxx76W6gf_3aJeIk",md: "VojwQW4_kmWvpsetc3ejlaE7fJR9IeR4ypc4OmO0Jpc-1739243413-1.2.1.1-JloeJKJIv1NmqtdgIemlGYuBRk9v4ZfQcqxHeUi4fB9krHcP04jyj0rj0OQHZvJtODSfwqaeZ7a8Ki0q28zv7oRo06qIsg0914kgnLavrLnXbBVrNBHYW0uPipDgv5pnc9Gby8whx1Q6EK_J1kTehur6E3f0J.2yKqI5XUKxrnJMQxDoGy.COJT.yJPHNZvRmjMmqQ.XDpvWvOxRBG2zm_ZM6vxRQ_qJrsDm4XsyMvymnYBqNSlZBqo1qjrsHlmWfxxrEC_eq8uc1FijTX68ucJYzsQ5Thx3UdEDm3LorQtsqkP0cfPkdOC5k97VRfrQ95cO1yKxYwSTiOPoKzU7H4DWNj8XRB5s4llLAgmbIPDNAASsxGD4o7ewQ8pJ9_sBtXYa1dO0pieAI77gVGLB_tyUNQh9ge8OTtxT3pnsJ.ufe.kdPVVz6lj.Yfo8PldXRJLknuilmMe1SGpU53sr4aIcl.NxXctSg9TE2.3nfBegQaqvcu_Y_JIR3PoHMDbzjCc8xAMKDbCqaWTG14phvQUKqs0oO_MZG9gc0yXfasJHin5nlKfQNd.x3rs3XWzAhOX6TbbZNcbwXlsrIJ81s.pSp3ibATRxk7wJ9kAmZtM7Er2B_2O4RrCb6onUTFTHjM4_wNj6_aihU4dGMQ1.a7wdmY1bvvQpcbKmUYBIF5EXQR9zlEa57xoHmnQFuqwF8q4RHiwYKoVEqHM84oJ.ZP5kwsNbQwew9Nd_lq1SopLE7Px6LK_FGY.WHQkQUBUdwb0SDvvV7rnlt51KcYjCb.NS1jDSaX3CPUq5UFiJhPZHUjDnkyUKmif6Mj5437.WjAXu52jFnunHrzB3QzagjJZ0zXu_ZkTQOm0JMXmVmYWwqX6jiBSd5U6rUydayFPVZciW6r9YN1.vnvErSQQICBXULl_GP2nZWW4C.HpCghcNHVke7n0e935bmKdXcKxTQjxlWNxQxZzCzrWdxZ2SqdR2fib6koUPT1RXYoYo3IxS1w.UT7a9o5IX.E36aKfUZVYgMOpDiW1308Nn3I61wtaZdW8.1XjabXs.pJCCT2QT8jaI.LVG.6TAY8cdJVrY6lxjOk_st439oG3rHsPgVEpCLXC9pFnGy.y1fWa4Z69bpgTayDeRoz05cehpQj3zND3IWnvkeqUA2qfVhTq7u0hwzOqysCysAFK15SZu74I9Nf2izOoluG8IjdPAs0GxTQb9PBMsw9Wp6TLAHWIEcyB6kFtblyTNz5iY536LqSMKfFySx3Lj9hGboHhDovJ9X5jUu3hQ6Jv6iTvYcSyFBh9NfeCGH8S0OfLD02G7IzTJk2qiFI19h0iATNFQWeYJWqH2aeeOxEqss6TgrEZNnADUhntGOMvrepDHRa45me_M3QNv1y7E9.bZDWgk66mNTCfS1h1h0unSEq09fJvy3mU4IZ0m9kEXH.V0pfSqipb7W4v0n044aomUWtbpUuAIuOehjHSYhsWJm_B9aVtRpYO81BDYb95WauPxWaPnk0GzbHEc0rJqkh3U_62NKo2Z5SGf6dciq2i8bwLO.3AFI0WBY444R4shVNdFC74L6kty6fJmIyBOaY_J2jjM364dvWIrikfXmDXNFoxiIDKLiRoZqawjsxOhRc0UDINRAwsbhOndtFYi8z9z4.adq6RYVb3n_uFMQCAMCM3FW_DekKlLxNwj3lWOQ5Vjsa4vrfuLSMmzqsHfA2BCoRIV7FAFFKBpTv1myRksjrpqga8L0Op6TfetyS1jGbFNMBbKXElkwSzYABAHCp.rRhUZJytMk1hCDKM7LdHR8tne1Tr275uxTZCQjt956MjhQAJlRHY2BXFShjwyoJGYsqmfLoabTSSeI.kDoEoNzMKxUOEx7.tTglPziGGoP0h8V282yWVtM5STkjh5uT..1Tb2gz6qoAf360cf1klkUhf0NeMIH54OIDlJ65hdD49fSpQ7f0rv6zFH.qF2nnTwCzf4H2MrSH.0cSIOkqecyw7wR0xgJzJ.1bbFflejOv2rB2SiYOjR9PB..9APZr9DuXoW1tLWgW.zMNvNEZRXYihFj6MGgsu.7zlBkTOf.XfQ59sJpgVxXFbiWPhq16UH9BDCiQDBH3igMtFu27V0DnSFOu3rgRUdiRAwDCjXGZm6nzKwtrMOIzkPTCxEmKVSDIfDxUhhAHOCvkIgKRIoEvehZGv7czm8jXwmfZfCXkePUdXkjiJpGwDRZUxwe.N.MbjOAluVQ8vTEvAOzMGmfhrkE5KUYA",mdrd: "3hz5pLLednk5BzdSTpKHyrebcrqSfjUTjY18YGIbtbA-1739243413-1.2.1.1-A05h2c4hKqYXGO4rkPGxJjhX59SF9G6J7EZEKBFVJ9h3XMmSyoH5NKHUlFcJu.DVAqE_ci6z91o5U5GphZ9J.MhAM7TcCLxFkTynNhuJPucF.KG7IcZe75KU1DMKg6eBoXc16KJoqEppzAeKEQq.uffxKPdhS2cUh_jbFGR.Xa6Wo8Mukdh9YTS.goM9IsCk17Je3gp_JvwAGUMDmKO0FfbXeF75ah5MrDG6oNvLuceEUeYy0WH1HTXqQMp5KABiEN8vYRp_60VoDGEeIi70aruX39QcS6p01HoJODrsPlNAegWvE0_mEKx70otTsKmHnQ8qMsHocj1ynN8fSFzhhP8NQkr3rlaQwQZ.OnTGqgLmyTFEzGeJ0C4_Voy6.uFVEy_bNtWwxUOc14P.yZhz3mLHbBQmJib9VxkR4C1m11xqmjZ1jgpjTfFwHQGTnLyiDh4RmYQuQDa2MmOhenC6rdupWRH9cSZmCLcbGOZCUcEfWisnIkR6EUOb4P.BIPutB9vnCbE5z0lDpkhcspaGMU8Xs32_JJ4SrJbwu5Uwe22Jb46D_P7muCvZGeHi2.dKBB3NDi8brWs1SfxpXC5fQs5xSeR5YFUGfZOnaL_H2c8iutScKKiATK2B09BrI1j_gNSsR36WcI78kQa8FJe9psXzjy8GLlTD..ifIpQHiSibx4NcoJ97S4hpthQxA7HffopSVEXLNSqSL18A7ALBxUo07jeW9YIh8qpSvYYgm.4oA6F64sO5fWGIjLn6dEMFRrmj1zVILGwgVwSDtfRsc236ZgKyo4V0Q6b5KeAyQZNtOXoVgghjS9_7vE7tnyLJLxOCxN.vn3QumvO6ky3UMukdT3.SI5yDqFWh6zyR19UoZ3bk5cQKmdjsr7Ztzn6GYCw36RstkHvk1eQQLH4b_9um7XAyUz.CtGU6IcuBa_Hhz_uRtngfUJRrPO4HpQFkITmUddUlSl3OJ__2Kfodmok0JIQXxyq5pRL9rMTz59gfjs3iTCqc8EepWyXqznJNbzQQLivqdabDjoYD51CLnSnC89TopGjAS3YlzquDTmG7FXVSlVc.fdn7xMYQS9EkmkVErrlXhsIi8nGqX7KSf_YFuxyW26J.TDcDZeknf22z5NPt9WGy05.1.ckae7ZRr5bENrvKf7D5CxPaI_f2vADzl2hdl6U7H9RUSwy98ehYCS5dNjPfNTLkUFP0UsSP6GPRiqK9GdGg85YBy5ArssWzlqbj37af1Kpnka20WsUooGYlf0w1g8XORjo_s4YjTRXYW79HVE7xUfLQACp0rBhxBPR2pMdZTrN2pZpOLh4pdegS73rOdrkB0G_cmOiz6sDv3tizC367S6klJoxA4CXREp7y4REHGlBK27hRlkryf8yjvgwEZF3e86G7pschprZMLbyUiLWMsb8CCn2xBerR6_bVWo.QEwspNBNhLWtK_5L_RH.oUBpdxcVXY3qckbGkR81jiLpTCtTn0d6KsruxAiVbIqzjEPkMe0AzkUBnqvGV_GMhf5oUiyK8rFyUMNr1vBj1pCRRXx_Im6lo47ZO17au4r8Q163mVc5GK2JJW539LGQLubJcp4r4PEdm0vhcnfEm2dXA5RLX8cz703izeFSXTLaYG86TQJQ_YPPl8Cwup1Asr0xU_7khhw5dDxpxuzLoCejj9NovuXopWUVCOYtA5gPWbDiaQyyTexilvgByMBfrpFZksS6yrSkTVciafwSu1WUPoT5nu4wp42cEQWSE3iEnyqxbI7kf_tUuDPr8VJ5lW_CNVwC3kLtumf0tLLMtJq7UpIgKCccBcUgzBCMM1YO_MF57lXwCJ64"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910125090b199c70';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/089190977262?__cf_chl_rt_tk=xBFdBFWaHsslVSXikqbQE2mLlst2VdP41LWhoZrqWuM-1739243413-1.0.1.1-bj1l_zEsljLqSHwJJR8D_N.KnkMKxx76W6gf_3aJeIk" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda